public class Example18 {
    public  static  void  main (String[] args) {
        int[] arr=new int[3];
        System.out.println("arr[0]=" + arr[0]);
        System.out.println("arr[1]=" + arr[1]);
        System.out.println("arr[2]=" + arr[2]);
        System.out.println("数组的长度是"+ arr.length);
    }
}
